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respiration and ethylene

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https://www.readbyqxmd.com/read/30042562/combined-postharvest-uv-c-and-1-methylcyclopropene-1-mcp-treatment-followed-by-storage-continuously-in-low-level-of-ethylene-atmosphere-improves-the-quality-of-tahitian-limes
#1
Penta Pristijono, Michael C Bowyer, Christopher J Scarlett, Quan V Vuong, Costas E Stathopoulos, John B Golding
The green Tahitian limes ( Citrus latifolia ) were exposed to 7.2 kJ m-2 UV-C and 0.5 μL L-1 1-methylcyclopropene (1-MCP) treatments both separately and in combination. After treatment, fruit were stored in ethylene free (i.e. air containing < 0.005 μL L-1 ) or 0.1 μL L-1 ethylene at 20 °C and 100% RH. The results showed that UV-C treatment delayed skin degreening and reduced endogenous ethylene production compared to untreated control fruit, however these effects reduced over the storage time...
July 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29896773/role-of-maturity-stages-and-modified-atmosphere-packaging-on-the-quality-attributes-of-cornelian-cherry-fruits-cornus-mas-l-throughout-shelf-life
#2
Tarık Yarılgaç, Hayrullah Kadim, Burhan Ozturk
BACKGROUND: A study was conducted to determine the effects of modified-atmosphere packaging (MAP) treatments on fruit quality attributes and bioactive compounds of cornelian cherry fruits (Cornus mas L.) harvested at two different maturity stages - maturity (M): M-1, skin red color <10%; M-2, skin red color >90% - throughout the shelf life. Fruits were stored at 0 ± 0.5 °C and 90 ± 5% relative humidity (RH) for 30 days, and then kept at 22 ± 0.5 °C and 80 ± 5% RH over 3 days for shelf life...
June 13, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29892135/edible-coatings-influence-the-cold-storage-life-and-quality-of-santa-rosa-plum-prunus-salicina-lindell
#3
Pushpendra Kumar, Shruti Sethi, R R Sharma, Manish Srivastav, Dinesh Singh, Eldho Varghese
Plum is a perishable fruit with a very short shelf life of 3-4 days. Several studies have suggested the possible use of edible coatings on maintaining quality and prolonging storage life of fresh horticultural produce. Hence, different edible coatings, namely, lac-based (2:3), Semperfresh™ (1:3) and Niprofresh® (1:5) were selected to observe their efficacy on quality retention of 'Santa Rosa' plums. The effects of these coatings on the physical, physiological and biochemical attributes were studied under cold storage conditions (2 ± 1 °C and 85-90% relative humidity)...
June 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29859042/parallel-online-determination-of-ethylene-release-rate-by-shaken-parsley-cell-cultures-using-a-modified-ramos-device
#4
Andreas Schulte, Jana Viola Schilling, Jannis Nolten, Anna Korona, Hannes Krömke, Jan-Bernd Vennekötter, Britta Schillheim, Matthias Wessling, Uwe Conrath, Jochen Büchs
BACKGROUND: Ethylene is an important plant hormone that controls many physiological processes in plants. Conventional methods for detecting ethylene include gas chromatographs or optical mid-infrared sensors, which are expensive and, in the case of gas chromatographs, are hardly suitable for automated parallelized online measurement. Electrochemical ethylene sensors are cheap but often suffer from poor resolution, baseline drifting, and target gas oxidation. Thus, measuring ethylene at extremely low levels is challenging...
June 1, 2018: BMC Plant Biology
https://www.readbyqxmd.com/read/29705568/postharvest-responses-of-sweet-cherry-fruit-and-stem-tissues-revealed-by-metabolomic-profiling
#5
Evangelos Karagiannis, Michail Michailidis, Katerina Karamanoli, Athina Lazaridou, Ioannis S Minas, Athanassios Molassiotis
Sweet cherry, a non-climacteric and highly perishable fruit, is usually cold-stored during post-harvest period to prevent senescence; therefore, metabolic profiling in response to cold storage in sweet cherry is of economic and scientific interest. In the present work, metabolic analysis was performed in fruit and stem tissues to determine the metabolic dynamics associated with cold storage in response to 1-methylcyclopropene (1-MCP), an ethylene-action inhibitor, and modified atmosphere packaging (MAP). Fruit (cv...
June 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29688581/effect-of-led-irradiation-on-the-ripening-and-nutritional-quality-of-postharvest-banana-fruit
#6
Jen-Yi Huang, Fengying Xu, Weibiao Zhou
BACKGROUND: With the ability to tailor wavelengths necessary to the photosynthetically active radiation spectrum of plant pigments, light-emitting diodes (LEDs) offer vast possibilities in horticultural lighting. The influence of LED light irradiation on major postharvest features of banana was investigated. Mature green bananas were treated daily with selected blue (464-474 nm), green (515-525 nm) and red (617-627 nm) LED lights for 8 days, and compared with non-illuminated control...
April 24, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29680049/nac-nor-mutations-in-tomato-penjar-accessions-attenuate-multiple-metabolic-processes-and-prolong-the-fruit-shelf-life
#7
Rakesh Kumar, Vajir Tamboli, Rameshwar Sharma, Yellamaraju Sreelakshmi
Several Penjar accessions of tomato grown in the Mediterranean exhibit prolonged shelf life and harbor alcobaca mutation. To uncover the metabolic basis underlying shelf life, we compared four Penjar accessions to Ailsa Craig. Three accessions bore alcobaca mutation, whereas the fourth was a novel NAC-NOR allele. Cuticle composition of Penjars varied widely during fruit ripening. All Penjars exhibited delayed ripening, prolonged on-vine and off-vine shelf life, low ethylene emission, and carotenoid levels. Metabolic profiling revealed shifts in Krebs cycle intermediates, amino acids, and γ-aminobutyric acid levels indicating the attenuation of respiration in Penjars during post-harvest storage...
September 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29622207/enhancing-storage-stability-of-guava-with-tannic-acid-crosslinked-zein-coatings
#8
Talita M Santos, Men de Sá M Souza Filho, Ebenézer de O Silva, Márcia R S da Silveira, Maria Raquel A de Miranda, Mônica M A Lopes, Henriette M C Azeredo
The quality of zein (Z)- and zein-tannic acid (ZTA)-coated guavas was monitored throughout 12 days of storage. Coated fruit showed lower changes in terms of visual appearance, chlorophyll contents and color. Weight loss, softening, and changes in soluble solids were also decreased by the coatings. The respiration peak as well as H2 O2 and superoxide dismutase activity peaks were delayed by the coatings, and the ethylene production was reduced. So, the results were consistent with a slowed down ripening of guavas by the coatings, which was probably related to lowered oxygen permeability of guava skin...
August 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29574324/transcript-analyses-of-ethylene-pathway-genes-during-ripening-of-chinese-jujube-fruit
#9
Zhong Zhang, Jian Huang, Xingang Li
The fruit of Chinese jujube (Ziziphus jujuba Mill.) is immensely popular worldwide, while its fleshy fruit has a very short shelf life and suffers serious postharvest damage. The fruit has been controversially classified as non-climacteric, though the mechanisms underlying its ripening behavior, particularly the role of ethylene, have remained unclear. In this study, low and stable ethylene production was detected during ripening of Z. jujuba 'Dongzao' fruit, with production increasing at the full maturity stage...
May 2018: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29509414/role-of-brassinosteroids-in-persimmon-diospyros-kaki-l-fruit-ripening
#10
Yiheng He, Jiaying Li, Qiuyan Ban, Shoukun Han, Jingping Rao
Brassinosteroids (BRs) are phytohormones that regulate numerous processes including fruit ripening. In this study, persimmon ( Diospyros kaki L.) fruits were treated with 24-epibrassinolide (EBR) or brassinazole (Brz, a BR biosynthesis inhibitor) and then stored at ambient temperature. The results show that endogenous BR contents gradually increased during persimmon fruit ripening. EBR treatment significantly increased both the content of water-soluble pectin and the activities of polygalacturonase, pectate lyase, and endo-1,4-beta-glucanase but significantly reduced the content of acid-soluble pectin and cellulose, resulting in rapid fruit softening...
March 21, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29508397/1-methylcyclopropene-1-mcp-effects-on-natural-disease-resistance-in-stored-sweet-potato
#11
Robert S Amoah, Leon A Terry
BACKGROUND: The potential of 1-methylcyclopropene (1-MCP) to maintain postharvest storage of sweet potato was studied. In two separate experiments, the orange-fleshed sweet potato cv. Covington was treated with 1-MCP (1.0 µL L-1 , 24 h) and roots stored at 15 °C. During storage, samples were evaluated for the respiration rate, sprout growth, weight loss, incidence of decay and changes in dry matter. The roots were further assayed for the temporal changes in individual non-structural carbohydrates and phenolic compounds in the skin and flesh tissues of the proximal (stem end), middle and distal (root end) regions...
March 6, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29486054/sensitivity-of-chickpea-and-faba-bean-to-root-zone-hypoxia-elevated-ethylene-and-carbon-dioxide
#12
Rushna Munir, Dennis Konnerup, Hammad A Khan, Kadambot H M Siddique, Timothy D Colmer
During soil waterlogging, plants experience O2 deficits, elevated ethylene, and high CO2 in the root-zone. The effects on chickpea (Cicer arietinum L.) and faba bean (Vicia faba L.) of ethylene (2 μL L-1 ), CO2 (2-20% v/v) or deoxygenated stagnant solution were evaluated. Ethylene and high CO2 reduced root growth of both species, but O2 deficiency had the most damaging effect and especially so for chickpea. Chickpea suffered root tip death when in deoxygenated stagnant solution. High CO2 inhibited root respiration and reduced growth, whereas sugars accumulated in root tips, of both species...
February 27, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29457690/carbon-atom-hybridization-matters-ultrafast-humidity-response-of-graphdiyne-oxides
#13
Hailong Yan, Shuyue Guo, Fei Wu, Ping Yu, Huibiao Liu, Yuliang Li, Lanqun Mao
Graphdiyne oxide (GDO), the oxidized form of graphdiyne (GDY), exhibits an ultrafast humidity response with an unprecedented response speed (ca. 7 ms), which is three times faster than that of graphene oxide (GO) with the same thickness and O/C ratio. The ultrafast humidity response of GDO is considered to benefit from the unique carbon hybridization of GDO, which contains acetylenic bonds that are more electron-withdrawing than ethylenic bonds in GO, consequently giving rise to a faster binding rate with water...
April 3, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29398783/effect-of-uv-c-on-the-physiology-and-biochemical-profile-of-fresh-piper-nigrum-berries
#14
Emma R Collings, M Carmen Alamar Gavidia, Katherine Cools, Sally Redfern, Leon A Terry
Application of UV-C has been shown to enhance the biochemical profile of various plant materials. This could be used to increase biochemical load, reducing the amount of material required but still impart equivalent flavour. As spices, such as black pepper ( Piper nigrum L.), are typically dried to low moisture content to create a stable product for transportation and storage, little work has explored the use of modern postharvest treatments to enhance flavour. In this work, fresh P. nigrum berries were exposed to four UV-C doses (0, 1, 5 and 15 kJ m-2 ) and subsequently stored at 5 °C for ca ...
February 2018: Postharvest Biology and Technology
https://www.readbyqxmd.com/read/29385616/distinct-gibberellin-functions-during-and-after-grapevine-bud-dormancy-release
#15
Chuanlin Zheng, Atiako Kwame Acheampong, Zhaowan Shi, Tamar Halaly, Yuji Kamiya, Ron Ophir, David W Galbraith, Etti Or
The molecular mechanism regulating dormancy release in grapevine buds is as yet unclear. It has been hypothesized that (i) abscisic acid (ABA) represses bud-meristem activity; (ii) perturbation of respiration induces an interplay between ethylene and ABA metabolism, which leads to removal of repression; and (iii) gibberellin (GA)-mediated growth is resumed. The first two hypothesis have been formally supported. The current study examines the third hypothesis regarding the potential involvement of GA in dormancy release...
March 24, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29253879/cold-shock-treatment-extends-shelf-life-of-naturally-ripened-or-ethylene-ripened-avocado-fruits
#16
Jiao Chen, Xixia Liu, Fenfang Li, Yixing Li, Debao Yuan
Avocado is an important tropical fruit with high commercial value, but has a relatively short storage life. In this study, the effects of cold shock treatment (CST) on shelf life of naturally ripened and ethylene-ripened avocado fruits were investigated. Fruits were immersed in ice water for 30 min, then subjected to natural or ethylene-induced ripening. Fruit color; firmness; respiration rate; ethylene production; and the activities of polygalacturonase (PG), pectin methylesterase (PME), and endo-β-1,4-glucanase were measured...
2017: PloS One
https://www.readbyqxmd.com/read/29240973/a-breathing-atom-transfer-radical-polymerization-fully-oxygen-tolerant-polymerization-inspired-by-aerobic-respiration-of-cells
#17
Alan E Enciso, Liye Fu, Alan J Russell, Krzysztof Matyjaszewski
The first well-controlled aqueous atom-transfer radical polymerization (ATRP) conducted in the open air is reported. This air-tolerant ATRP was enabled by the continuous conversion of oxygen to carbon dioxide catalyzed by glucose oxidase (GOx), in the presence of glucose and sodium pyruvate as sequential sacrificial substrates. Controlled polymerization using initiators for continuous activator regeneration (ICAR) ATRP of oligo(ethylene oxide) methyl ether methacrylate (OEOMA, Mn =500) yielded polymers with low dispersity (1...
January 22, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29096083/gene-network-underlying-the-response-of-harvested-pepper-to-chilling-stress
#18
Sun-Young Shin, Me-Hea Park, Ji-Weon Choi, Ji-Gang Kim
Cold storage is an effective postharvest control strategy to maintain the freshness of vegetables by suppressing respiration. However, subtropical plants including pepper (Capsicum annuum L.) undergo chilling injury. To better understand the molecular mechanisms involved in preventing chilling injury, transcriptome profiling analysis of peppers stored in a cold chamber and treated with 50μM methyl jasmonate (MeJA) and 1μLL-1 1-methylcyclopropene as an ethylene reaction inhibitor was performed. A total of 240, 470, and 290 genes were upregulated and 184, 291, and 219 genes down-regulated in cold-, MeJA- and 1-methylcyclopropene-treated peppers, respectively...
December 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29045490/the-ethylene-response-factor-aterf4-negatively-regulates-the-iron-deficiency-response-in-arabidopsis-thaliana
#19
Wei Liu, N J Umuhoza Karemera, Ting Wu, Yafei Yang, Xinzhong Zhang, Xuefeng Xu, Yi Wang, Zhenhai Han
Iron (Fe) deficiency is one of many conditions that can seriously damage crops. Low levels of photosynthesis can lead to the degradation of chlorophyll content and impaired respiration in affected plants, which together cause poor growth and reduce quality. Although ethylene plays an important role in responses to Fe deficiency, a limited number of studies have been carried out on ethylene response factor (ERFs) as components of plant regulation mechanisms. Thus, this study aimed to investigate the role of AtERF4 in plant responses to Fe deficiency...
2017: PloS One
https://www.readbyqxmd.com/read/29037733/continuous-exposure-to-ethylene-in-the-storage-environment-adversely-affects-afourer-mandarin-fruit-quality
#20
Yongxin Li, John B Golding, Jayashree Arcot, Ron B H Wills
'Afourer' mandarins were stored in air containing ethylene at 0.001, 0.01, 0.1, and 1μLL-1 at 20, 10, 5 and 0°C and changes in a range of external and internal quality parameters were examined for up to 10weeks in storage. At all storage temperatures, reducing ethylene concentration in the storage environment decreased the rate of respiration, visible deterioration of the calyx region, ethanol accumulation in the juice, loss of eating quality, and at chilling temperatures reduced rind pitting. The quality attributes limiting mandarin storage life differed between the different storage temperatures but retention of mandarin quality was always optimised by maintaining the lowest possible ethylene atmosphere around fruit...
March 1, 2018: Food Chemistry
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